[Tagging] maxspeed:signed=no - new proposed tag

Florian Lohoff f at zz.de
Mon Jan 4 09:01:57 UTC 2021

Hi Niels and others,

On Mon, Jan 04, 2021 at 01:36:53AM +0100, Niels Elgaard Larsen wrote:
> But does that depend on whether the maxspeed is signed?
> For example in DK the maxspeed for busses is 80, except that some
> busses can do 100 on motorways.
> The default speed on motorways is 130, but it is often signed as 110.
> But it can be lower at interchanges or roadworks.
> So for a bus on a motorway its max speed is just min(100,maxspeed)
> Everywhere else it is min(80,maxspeed)

As people with Bus or HGV drivers license know - these are completely
different things.

You have a maxspeed signed on the street. This is the maximum allowed
speed on that road.

Then you have maxspeeds which are assigned to your vehicle (A car does
not have this). In German this is called "Bauartbedingte
Höchstgeschwindigkeit". This speed limit depends on whether you are a
Bus, a HGV, a trailer or a specific (max-)weight.

So in Germany a HGV may only travel 60Kmh on non Motorway roads. It is allowed
to go 80Kmh on Motorways.
Trailers (For Cars) are typically limited to 80Kmh with some exemptions of
100Kmh under certain conditions.

So the signed or posted maxspeed still applies to that section of the
road (In Germany until further notice) but you may not drive this
maxspeed as there are further legal limits on your vehicle. No need
to tag this on the road as its NOT a road specific attribute.

Florian Lohoff                                                 f at zz.de
        UTF-8 Test: The 🐈 ran after a 🐁, but the 🐁 ran away
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